public void AddItemToDatabase()
{
var data = new List <Item>()
{
new Item(1, "Bord", 45, "152", "Kid"),
new Item(2, "Bord1", 45, "185", "Male")
}.AsQueryable();
var mockSet = new Mock <DbSet <Item> >();
mockSet.As <IQueryable <Item> >().Setup(m => m.Provider).Returns(data.Provider);
mockSet.As <IQueryable <Item> >().Setup(m => m.Expression).Returns(data.Expression);
mockSet.As <IQueryable <Item> >().Setup(m => m.ElementType).Returns(data.ElementType);
mockSet.As <IQueryable <Item> >().Setup(m => m.GetEnumerator()).Returns(data.GetEnumerator());
var mockContext = new Mock <SkiResortContext>();
mockContext.Setup(c => c.Items).Returns(mockSet.Object);
var service = new RentalController(mockContext.Object);
data.ToList().ForEach(t => service.Add(t));
}